Pipe-fitting.



` C. A. OLSON.

PIPE mmm.

Patented Feb. 5, 1918.

APPLICATION FILED AUG-2l 1917.

2 SHEETS-SHEET 1.

Mmmm.,

. @iQ/f' l HEIM i l iii r l 0 y l` C. A. OLSON.

PIPE FITTING.

APPLIcAnoN HLED AuG.2|. |911.

Pmtentd Feb. 5,191@

Z SHEETS-SHEET 3 VIII' I JZ CHLES A. OLSON, OF CHICAGO, ILLINOIS,ASSIGNOR T0 CRANE COMPANY, OIF CHICAGO,

ILLINOIS, A CORPORATION OF ILLINOIS.

PIPE-FITTING.

matassa.

specification of Letters raient.

vApplication led August 21, 1917. Serial No. 187,397.

To all whom t may concern.'

Be it known that I, CHAnLns A. OLSON, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certainnew and ilseful Improvements in Fipe-Fittings, of whichthe following is a specification.

My invention relates to ipe-fittings, and has for its objects to providean improved construction of body designed, generally, to increase theefficiency, utility, and durability of the fitting, thereby adapting thesaine for extremely high working pressures, and more specifically inthis connectionto obtain an increase of over one hundred per cent. inthe pressure resisting power of the improved fitting, as compared withthe customary straight body fitting, and without appreciably increasingits weight, at the same time providing therefor a finished andcommercially acceptable appearance.

'Ihe above, together with such other objects as may hereinafter appear,or are incident to my invention, I obtain by means of the constructionillustrated in preferred form in the accompanying drawings, where-1111*-,

Figure 1 illustrates the ordinary straight body-type of 'Il' fitting;

Fig. 2 is a side elevation of my improved construction of 'lV-body;

Figs. 3 and 4: are horizontal sectional views taken on lines 3 3 and44inFig.2;

Fig. 5 represents a central vertical section taken through Fig. 2;

Fig. 6 is a rear elevation of the saine; and Fig. 7 represents a frontelevation of the main bore and a vertical section of the neck or branchbore taken on the line 7 7 of Fig. 5.

ing and bulging of the body to a point where it takes a permanent set,with consequent leakage at joints; which, in either case,

would impair the functioning of the high pressure line in which thefitting may be interposed. In the case of a .'lF-tting, `for example, ithas been ascertained Yby test, that such stretching and bulging takesplace within the flat zone that occurs at each lside of the fitting, thegreatest stretch taking lplace at points near the intersection of thetwo center lines of the bores, which points form the margin of themaximum internal cross-sectional area of the fitting. This fiat zone isclearly portrayed in A, in the 'Il' shown in Fig. 1 of the drawings,which serves to illustrate the ordinary straight bodied fitting 6, andthe point of intersection referred to is -approximatelyt indicated bythe reference letter B in said figure, and B in the other figures.

With a view of eliminating these fiat side zones, and rendering thefitting capable of withstanding considerably higher internal pressure,at least equal to the rating of the line into which it would normallybe. introduced, I form the body of the fitting or I, 7, in the mannerillustrated in Fig. 2, et seg., wherein the reference letter Cdesignates the neck and D the body portion of the fitv ting, and Il thebranch bore communicating laterally with the main longitudinal bore F,the former being flanged terminally at II in the customary manner.

In carrying out my invention I externally form the fitting with an ov'albody intermediate its ends, without in any way changing the normalconformation or diametrical proportions of the bores E and F. rIhedotted line 8 in Figs. 2, 3, and 7, is indicative of the normal wallthickness of the ordinary fitting, said lin-e 8 in Fig. 2 correspondingwith the full line 9 to the right of Fig. 1. y

From. an inspection of the drawings it Will be apparent that the sweepof the oval lor bulge has its inception at the arcuate lines ofjuncture,l at the sides of the T, between the side walls of the bores Eand F and their respective terminals G and I-I, the metal increasingslightly in thickness, in a direction away from said terminals and thecrotches therebetween, over each of those side portions 11, which wouldnormally einbody the fiat spot A, the increase -or distribution inthickness of metal being at least i'i proportion, approximately, to theinternal cross-sectional area of the fitting.

In the points 10, which if joined would pass through the axis B', thegreatest thickness of the metal is reached and the curvature thusestablished, taken in a direct line reduction or increase, about therear face 9 of the fitting and intermediately of said side portions 11.I have found by actual test of va 'T embodying my invention, that onlywith an increase of bodyweight amounting to eleven per cent. over thestraightbody iitting, such T was enabled to withstand an internalpressure of one hunderd and twenty per cent. greater than the ordinarystraight body iitting could withstand under like circumstances.

What I claim is:-

1. In a high pressure system, the combination with a line constructed toconduct eX- tremely high Working pressures, of a fitting bored forinterpositlon therein as part of said line and having a concaved crotchportion disposed at one side of the bore intermediate end portions ofthe fitting, the wall of the iitting provided externally with a gradualincrease in metal thickness inwardly from said end portions and fromsaid crotch portion toward the other side of the bore and distributed toform an external convex contour with the greatest metal thicknessdisposed about the maximum internal crossing extremely high Workingpressures, the

fitting having a through bore and a concaved crotch portion disposed atone side of the bore intermediate end portions of the fitting, the wallof the fitting provided with a gradual increase in metal thicknessinwardly from said end portions and toward the other side of the borefrom said crotch portion and distributed to form a convex contour withthe greatest metal thickness disposed about the maximum internalcross-sectional area of the iitting and diminished in thickness at thecrotch and end portions, saidV increase representing approxlmatelyeleven per cent. of the weight of the fitting; substantially asdescribed and for the purposes set forth.

In testimony whereof I have hereunto set my hand to this specification.

CHARLES A. OLSON.

